The St. Francis Dam was a concrete gravity dam located in San Francisquito Canyon in northern Los Angeles County, California that was built between 1924 and 1926 to serve the city of Los Angeles's growing water needs. It failed catastrophically in 1928 due to a defective soil foundation and design flaws, unleashing a flood that claimed the lives of at least 431 people. The collapse of the dam is considered to have been one of the worst American civil engineering disasters of the 20th Century, and remains the 3rd-greatest loss of life in California's history, exceeded only by the 1906 San Francisco earthquake and fire and the Great Flood of 1862.
The Santa Clarita Valley (SCV) is part of the upper watershed of the Santa Clara River in Southern California. The valley was part of the 48,612-acre (19,673 ha) Rancho San Francisco Mexican land grant. Located in Los Angeles County, its main population center is the city of Santa Clarita which includes the communities of Canyon Country, Newhall, Saugus, and Valencia. Adjacent unincorporated communities include Castaic, Stevenson Ranch, Val Verde, and the unincorporated parts of Valencia.
The Tejon Pass, previously known as Portezuelo de Cortes, Portezuela de Castac, and Fort Tejon Pass is a mountain pass between the southwest end of the Tehachapi Mountains and northeastern San Emigdio Mountains, linking Southern California north to the Central Valley. Both the pass and the grade north of it to the Central Valley are commonly referred to as "the Grapevine". It has been traversed by major roads such as the El Camino Viejo, the Stockton – Los Angeles Road, the Ridge Route, U.S. Route 99, and now Interstate 5.
The Ridge Route, officially the Castaic–Tejon Route, was a two-lane highway between Los Angeles County and Kern County, California. Opened in 1915 and paved with concrete between 1917 and 1921, the road was the first paved highway directly linking the Los Angeles Basin with the San Joaquin Valley over the Tejon Pass and the rugged Sierra Pelona Mountains ridge south of Gorman. Much of the old road runs through the Angeles National Forest, and passes many historical landmarks, including the National Forest Inn, Reservoir Summit, Kelly's Half Way Inn, Tumble Inn, and Sandberg's Summit Hotel. North of the forest, the Ridge Route passed through Deadman's Curve before ending at Grapevine.
The Angeles National Forest (ANF) of the U.S. Forest Service is located in the San Gabriel Mountains and Sierra Pelona Mountains, primarily within Los Angeles County in southern California. The ANF manages a majority of the San Gabriel Mountains National Monument.
Soledad Canyon is a long narrow canyon/valley located in Los Angeles County, California between the cities of Palmdale and Santa Clarita. It is a part of the Santa Clara River Valley, and extends from the top of Soledad Pass to the open plain of the valley in Santa Clarita. The upstream section of the Santa Clara River runs through it.
Canyon Country is a neighborhood in the eastern part of the city of Santa Clarita, in northwestern Los Angeles County, California, United States. It lies along the Santa Clara River between the Sierra Pelona Mountains and the San Gabriel Mountains. It is the most populous of Santa Clarita's four neighborhoods.
Sierra Highway or El Camino Sierra is a road in Southern California, United States. El Camino Sierra refers to the full length of a trail formed in the 19th century, rebuilt as highways in the early 20th century, that ran from Los Angeles to Lake Tahoe following parts of modern State Route 14, U.S. Route 395 and State Route 89. Two portions of this road are currently signed as Sierra Highway. The first is an old alignment of SR 14/U.S. Route 6 from Los Angeles to Mojave. This road is also signed with the unusual designation of State Route 14U through the city of Santa Clarita. The second part signed as Sierra Highway is a portion of US 395 in Bishop.
Castaic Creek is a 25.0-mile-long (40.2 km) stream in the Sierra Pelona Mountains, in northeastern Los Angeles County, California. It is a tributary of the Santa Clara River.
Elizabeth Lake is a natural sag pond that lies directly on the San Andreas Fault in the northern Sierra Pelona Mountains, in northwestern Los Angeles County, southern California.
The Sierra Pelona, also known as the Sierra Pelona Ridge or the Sierra Pelona Mountains, is a mountain ridge in the Transverse Ranges in Southern California. Located in northwest Los Angeles County, the ridge is bordered on the north by the San Andreas fault and lies within and is surrounded by the Angeles National Forest.
The Mulholland Dam is a Los Angeles Department of Water and Power dam located in the Hollywood Hills of Los Angeles, California, east of the Hollywood Freeway. Designed with a storage capacity of 7,900 acre⋅ft (9,700,000 m3) of water at a maximum depth of 183 feet (56 m), the dam forms the Hollywood Reservoir, which collects water from various aqueducts and impounds the creek of Weid Canyon.
Green Valley is a census-designated place in the Sierra Pelona Mountains, in Los Angeles County, California. It lies at an elevation of 2936 feet. The population was 1,027 at the 2010 census.
The Stockton–Los Angeles Road, also known as the Millerton Road, Stockton–Mariposa Road, Stockton–Fort Miller Road or the Stockton–Visalia Road, was established about 1853 following the discovery of gold on the Kern River in Old Tulare County. This route between Stockton and Los Angeles followed by the Stockton–Los Angeles Road is described in "Itinerary XXI. From Fort Yuma to Benicia, California", in The Prairie Traveler: A Hand-book for Overland Expeditions by Randolph Barnes Marcy. The Itinerary was derived from the report of Lieutenant R. S. Williamson on his topographical survey party in 1853, that was in search of a railroad route through the interior of California.
El Camino Viejo a Los Ángeles, also known as El Camino Viejo and the Old Los Angeles Trail, was the oldest north-south trail in the interior of Spanish colonial Las Californias (1769–1822) and Mexican Alta California (1822–1848), present day California. It became a well established inland route, and an alternative to the coastal El Camino Real trail used since the 1770s in the period.
San Francisquito Creek, in Los Angeles County, is a tributary stream of the Santa Clara River. It drains the south facing slopes of the Sierra Pelona Mountains of the San Gabriel Mountains within the Transverse Range of California, United States.
San Francisquito Pass is a mountain pass in the Sierra Pelona Mountains, located northeast of Green Valley and Santa Clarita, in northern Los Angeles County, California.
Mud Spring, formerly called Aquaje Lodoso, is a spring and historic site in the western Antelope Valley, within northern Los Angeles County, southern California.
King's Station, also known as Moore's and Hollandsville, was a stagecoach station of the Butterfield Overland Mail 1st Division between 1858 and 1861 in southern California.
Dry Canyon Reservoir is a small reservoir formed by an embankment dam on Dry Canyon Creek in the foothills of the Sierra Pelona Mountains of northern Los Angeles County, California, just north of the city of Santa Clarita. It was designed as a part of the Los Angeles Aqueduct system.
